英语词汇“three-grade system signal”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	three-grade system signal
释义	three-grade system signal 三级制信号
随便看	primary reverse impulse primary review authority primary reward primary ribbed wall primary right primary rights primary ring primary risk primary rna transcript primary road primary rock primary rocks primary rock(s) primary rockwell hardness standard machine primary rockwell superficial hardness standard machine primary room primary root primary root straight root primary route primary routing code primary royal pair primary rule primary run-time system primary runway primary safety mechanism 乞乞1 乞2 乞3 乞儿乘车乞儿马医乞哀告怜乞浆得酒乞穷俭相也ロウセイロウセキロウセツロウゼキロウソロウソウロウソウ 20463 20464 20465